Stone crushing or breaking machine



H. O. JONES STONE CRUSHING OR BREAKING MACHINE Aug. 33,, 194

Filed Feb. 15, 1940 l'nzo eni'an" Jiarrg @mle, I

Patented Aug. 13, 1940 UNHTE srss PATENT OFFICE Harry Owen Jones, Whitkirk, near Leeds, England Application February 15, 1940, Serial No. 319,148 In Great Britain July 28, 1938 4 Claims.

This invention relates to stone crushing or breaking machines of the types either for secondary crushing or granulating, or for coarse crushing, wherein the material is crushed between a fixed and a swinging jaw, With this type of stone crushing or breaking machine it has been found that excessive wear takes place at the lower end of the jaw plates and in order to lengthen the useful life of the jaw plates they have usually been constructed so as to be reversible to the effect that the plates have to be discarded when their upper and lower edges are worn, whilst the centre portions of the plates are comparatively unimpaired.

In order to increase the life of the jaws it has been proposed to make them of interchangeable sections all of the same size and to key them together by means of tongues and grooves extending along their abutting edges.

According to the invention the interchangeable sections of the jaw plate are keyed together by co-operating tongues and grooves extending across the abutting edges and so disposed that each section can be placed in the jaw either way In order that the invention may be clearly understood and readily carried into effect, the same will now be more fully described with reference to and by the aid of the accompanying drawing, wherein:

Figure 1 is a sectional side elevation of the jaws of a stone crushing machine.

Figure 2 is a front elevation of the sectional fixed jaw plate.

Figure 3 is a plan View of Figure 2.

Figure 4 is a front elevation of the sectional swinging or movable jaw plate.

Figure 5 is a plan view of Figure 4.

Referring to the drawing, the machine comprises a fixed jaw l and a swinging jaw 2, the latter being mounted upon the shaft 3 in the machine frame 4 and operated by the arm 5 connected to the operating mechanism (not shown). The fixed jaw plate comprises a number of sections 8 made all of a corresponding shape, as shown, so that they are interchangeable one with another. The sections 6 are keyed together by means of tongues i and grooves 8 extending across their adjacent faces. In this latter connection the tongues and grooves at the abutting edges of the sections 6 are so disposed that each section 6, whilst being interchangeable, may be placed in the jaw I either way up. In other words the various sections of the jaw plate are so constructed that each section is capable of being removed independently of the other sections and replaced in a reversed position end for end. Further grooves 9 are provided on the sections 6 so that a suitable tool may be inserted for the purpose of lifting the sections from the jaw for the removal and insertion of the sections. The swinging jaw comprises a number of correspondingly shaped sections it secured together by means of tongues ii and grooves I2 which are dove-tailed so as to give additional strength to the jaw plate. The sections are clamped together in the jaw by means of the clamp l3 and stop l4.

Each of the sections constituting the jaw plate is characterized by having a tongue adjacent one end of an abutting edge and a groove adjacent the opposite end of the same edge adapted to engage a corresponding groove and tongue respectively disposed on the abutting edge of an adjoining section. The tongues are adapted to slide in the corresponding grooves in adjoining sections in a direction normal to the working face of the jaw. I

In order to replace a worn portion, that section may be withdrawn from the jaw and substitut'ed by a new sectionplaced either in the cavity vacated by the worn section or if the bottom section has been removed, the upper sections may be so adjusted or moved down the jaw face as to enable the new section to be secured at the top of the jaw plate.

I claim:

1. In a stone crushing machine a plurality of interchangeable jaw sections arranged side by side to form a jaw plate, said sections having tongues and grooves formed on their sides, the tongues on each plate fitting in corresponding grooves formed on adjoining sections, whereby said sections are keyed together, said tongues and grooves being so formed that each section is capable of being removed independently of the other sections and replaced in a reversed position end for end.

2. In a stone crushing machine a plurality of interchangeable jaw sections arranged side by side to form a jaw plate, said sections having tongues and grooves integrally formed on their sides, the tongues on each plate fitting in corresponding grooves formed on adjoining sections, whereby said sections are keyed together, said tongues and grooves being so formed that each section is capable of being removed independently of the other sections and replaced in a reversed position end for end.

3. In a stone crushing machine a plurality of interchangeable jaw sections arranged side by side to form a jaw plate, each of said sections having tongues and grooves integrally formed on their sides, the tongues on each plate fitting in corresponding grooves formed on adjoining sections, whereby said sections are keyed together, said tongues and grooves being so formed that each section is capable of being removed independently of the other sections and replaced in a reversed position end for end.

4. In a stone crushing machine a plurality of interchangeable sections arranged side by side to form a jaw plate each of said sections being 

